Device for applying fluid material on a substrate, and application valve
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 13, 2004
Grant Date -
Nov 6, 2003
app pub date -
Jun 12, 2003
filing date -
May 16, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention pertains to a device for applying fluid material on a substrate. The device includes a valve body, a pole piece, and an electromagnetic drive unit that generates a magnetic field that moves the valve body relative to a pole piece between a closed position that interrupts the flow of material and an open position that releases the flow of material. The effect of the magnetic field provided by the drive unit is strengthened by the presence of a flux element. The flux element incorporates a portion, such as a slit, that eliminates circumferential electrical current paths, which allows the flux element to demagnetize more quickly when the drive unit is de-energized to remove the electromagnetic field. The rapid demagnetization decreases the cycle time for moving the valve body from the open position to the closed position.
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